I am running WRF with mp_physics = 28 using GFS FNL data as meteorological input. The simulation works in 2 domains, but fails when all three domains are active together with SST and QNA updates. It is running fine when either QNA or SST update is off. But when both options are turned on in 3 3-domain simulation, it is giving an error after 6 hours, which is the input interval for the Aux input files. I would appreciate help identifying what is wrong.
interval_seconds = 21600,
input_from_file = .true., .true., .true.,
history_interval = 360, 180, 60,
frames_per_outfile = 1, 1, 1,
restart = .false.,
io_form_history = 2,
io_form_restart = 2,
io_form_input = 2,
io_form_boundary = 2,
auxinput4_inname = "wrflowinp_d<domain>",
auxinput4_interval = 360, 360, 360,
io_form_auxinput4 = 2,
auxinput17_inname = "wrfqnainp_d<domain>",
auxinput17_interval = 360, 360, 360,
io_form_auxinput17 = 2,
force_use_old_data = .true.,
&domains
p_top_requested = 3000,
num_metgrid_levels = 32,
num_metgrid_soil_levels = 4,
wif_input_opt = 1,
num_wif_levels = 30,
dx = 9000, 3000, 1000,
dy = 9000, 3000, 1000,
grid_id = 1, 2, 3,
parent_id = 1, 1, 2,
&physics
mp_physics = 28, 28, 28,
ra_lw_physics = 4, 4, 4,
ra_sw_physics = 4, 4, 4,
sf_sfclay_physics = 1, 1, 1,
sf_surface_physics = 2, 2, 2,
bl_pbl_physics = 1, 1, 1,
cu_physics = 1, 1, 0,
isfflx = 1,
ifsnow = 1,
icloud = 1,
surface_input_source = 1,
num_soil_layers = 4,
num_land_cat = 20,
qna_update = 1,
sst_update = 1,
tmn_update = 1,
sst_skin = 1,
/
ERROR,,

Any suggestions or examples of a working three‑domain MP28 + QNA + SST‑update configuration would be very helpful.
Thank you in advance for your help.
- WRF version: 4.7.1
interval_seconds = 21600,
input_from_file = .true., .true., .true.,
history_interval = 360, 180, 60,
frames_per_outfile = 1, 1, 1,
restart = .false.,
io_form_history = 2,
io_form_restart = 2,
io_form_input = 2,
io_form_boundary = 2,
auxinput4_inname = "wrflowinp_d<domain>",
auxinput4_interval = 360, 360, 360,
io_form_auxinput4 = 2,
auxinput17_inname = "wrfqnainp_d<domain>",
auxinput17_interval = 360, 360, 360,
io_form_auxinput17 = 2,
force_use_old_data = .true.,
&domains
p_top_requested = 3000,
num_metgrid_levels = 32,
num_metgrid_soil_levels = 4,
wif_input_opt = 1,
num_wif_levels = 30,
dx = 9000, 3000, 1000,
dy = 9000, 3000, 1000,
grid_id = 1, 2, 3,
parent_id = 1, 1, 2,
&physics
mp_physics = 28, 28, 28,
ra_lw_physics = 4, 4, 4,
ra_sw_physics = 4, 4, 4,
sf_sfclay_physics = 1, 1, 1,
sf_surface_physics = 2, 2, 2,
bl_pbl_physics = 1, 1, 1,
cu_physics = 1, 1, 0,
isfflx = 1,
ifsnow = 1,
icloud = 1,
surface_input_source = 1,
num_soil_layers = 4,
num_land_cat = 20,
qna_update = 1,
sst_update = 1,
tmn_update = 1,
sst_skin = 1,
/
ERROR,,

Any suggestions or examples of a working three‑domain MP28 + QNA + SST‑update configuration would be very helpful.
Thank you in advance for your help.